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2004 Buick Lesabre emissions test

Tiny
2CP-ARCHIVES
  • MEMBER
  • 2004 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 14,000 MILES
2004 Buick LeSabre 3800 mileage: 14,000. I have tried to get this car to pass the emissions test. There are no fault codes, car runs well except for a loping idle and sometimes a spit and die at idle. HC and CO are way out of range. O2 reads.8v at idle. Exhaust smells very rich. I have replaced the ECT and TP sensors, plugs, wires and filters. Fuel pressure is 40 psi. I need voltage specs forthe TP and MAF sensors.
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Tuesday, October 19th, 2010 AT 5:21 PM

1 Reply

Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,542 POSTS
Reference voltage is 5 volts at the sensor. Fuel pressure should be 35 pounds. Check compression and check for vacuum leaks also check that the EGR valve is not hanging up. Replace Oxygen sensor.
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Tuesday, October 19th, 2010 AT 5:25 PM

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